Initial revision

1 files changed, 746 insertions, 0 deletions

diff --git a/board/sixnet/flash.c b/board/sixnet/flash.c
new file mode 100644
index 0000000..c201875
--- /dev/null
+++ b/board/sixnet/flash.c
@@ -0,0 +1,746 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it
+ *        has nothing to do with the flash chip being 8-bit or 16-bit.
+ */
+#ifdef CONFIG_FLASH_16BIT
+typedef unsigned short FLASH_PORT_WIDTH;
+typedef volatile unsigned short FLASH_PORT_WIDTHV;
+#define	FLASH_ID_MASK	0xFFFF
+#else
+typedef unsigned long FLASH_PORT_WIDTH;
+typedef volatile unsigned long FLASH_PORT_WIDTHV;
+#define	FLASH_ID_MASK	0xFFFFFFFF
+#endif
+
+#define FPW	FLASH_PORT_WIDTH
+#define FPWV	FLASH_PORT_WIDTHV
+
+#define ORMASK(size) ((-size) & OR_AM_MSK)
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(FPWV *addr, flash_info_t *info);
+static void flash_reset(flash_info_t *info);
+static int write_word_intel(flash_info_t *info, FPWV *dest, FPW data);
+static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data);
+static void flash_get_offsets(ulong base, flash_info_t *info);
+#ifdef CFG_FLASH_PROTECTION
+static void flash_sync_real_protect(flash_info_t *info);
+#endif
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init (void)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	unsigned long size_b;
+	int i;
+
+	/* Init: no FLASHes known */
+	for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	size_b = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_info[0].size = size_b;
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx\n",size_b);
+	}
+
+	/* Remap FLASH according to real size, so only at proper address */
+	memctl->memc_or0 = (memctl->memc_or0 & ~OR_AM_MSK) | ORMASK(size_b);
+
+	/* Do this again (was done already in flast_get_size), just
+	 * in case we move it when remap the FLASH.
+	 */
+	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+#ifdef CFG_FLASH_PROTECTION
+	/* read the hardware protection status (if any) into the
+	 * protection array in flash_info.
+	 */
+	flash_sync_real_protect(&flash_info[0]);
+#endif
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+#endif
+
+	return (size_b);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t *info)
+{
+	FPWV *base = (FPWV *)(info->start[0]);
+
+	/* Put FLASH back in read mode */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+		*base = (FPW)0x00FF00FF;	/* Intel Read Mode */
+	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
+		*base = (FPW)0x00F000F0;	/* AMD Read Mode */
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	/* set up sector start address table */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL
+	    && (info->flash_id & FLASH_BTYPE)) {
+		int bootsect_size;	/* number of bytes/boot sector	*/
+		int sect_size;		/* number of bytes/regular sector */
+
+		bootsect_size = 0x00002000 * (sizeof(FPW)/2);
+		sect_size =     0x00010000 * (sizeof(FPW)/2);
+
+		/* set sector offsets for bottom boot block type	*/
+		for (i = 0; i < 8; ++i) {
+			info->start[i] = base + (i * bootsect_size);
+		}
+		for (i = 8; i < info->sector_count; i++) {
+			info->start[i] = base + ((i - 7) * sect_size);
+		}
+	}
+	else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
+		 && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) {
+
+		int sect_size;		/* number of bytes/sector */
+
+		sect_size = 0x00010000 * (sizeof(FPW)/2);
+
+		/* set up sector start address table (uniform sector type) */
+		for( i = 0; i < info->sector_count; i++ )
+			info->start[i] = base + (i * sect_size);
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info (flash_info_t *info)
+{
+	int i;
+	uchar *boottype;
+	uchar *bootletter;
+	uchar *fmt;
+	uchar botbootletter[] = "B";
+	uchar topbootletter[] = "T";
+	uchar botboottype[] = "bottom boot sector";
+	uchar topboottype[] = "top boot sector";
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:	printf ("AMD ");		break;
+	case FLASH_MAN_BM:	printf ("BRIGHT MICRO ");	break;
+	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
+	case FLASH_MAN_SST:	printf ("SST ");		break;
+	case FLASH_MAN_STM:	printf ("STM ");		break;
+	case FLASH_MAN_INTEL:	printf ("INTEL ");		break;
+	default:		printf ("Unknown Vendor ");	break;
+	}
+
+	/* check for top or bottom boot, if it applies */
+	if (info->flash_id & FLASH_BTYPE) {
+		boottype = botboottype;
+		bootletter = botbootletter;
+	}
+	else {
+		boottype = topboottype;
+		bootletter = topbootletter;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM640U:
+		fmt = "29LV641D (64 Mbit, uniform sectors)\n";
+		break;
+        case FLASH_28F800C3B:
+        case FLASH_28F800C3T:
+		fmt = "28F800C3%s (8 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL800B:
+	case FLASH_INTEL800T:
+		fmt = "28F800B3%s (8 Mbit, %s)\n";
+		break;
+        case FLASH_28F160C3B:
+        case FLASH_28F160C3T:
+		fmt = "28F160C3%s (16 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL160B:
+	case FLASH_INTEL160T:
+		fmt = "28F160B3%s (16 Mbit, %s)\n";
+		break;
+        case FLASH_28F320C3B:
+        case FLASH_28F320C3T:
+		fmt = "28F320C3%s (32 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL320B:
+	case FLASH_INTEL320T:
+		fmt = "28F320B3%s (32 Mbit, %s)\n";
+		break;
+        case FLASH_28F640C3B:
+        case FLASH_28F640C3T:
+		fmt = "28F640C3%s (64 Mbit, %s)\n";
+		break;
+	case FLASH_INTEL640B:
+	case FLASH_INTEL640T:
+		fmt = "28F640B3%s (64 Mbit, %s)\n";
+		break;
+	default:
+		fmt = "Unknown Chip Type\n";
+		break;
+	}
+
+	printf (fmt, bootletter, boottype);
+
+	printf ("  Size: %ld MB in %d Sectors\n",
+		info->size >> 20,
+		info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+
+	for (i=0; i<info->sector_count; ++i) {
+		if ((i % 5) == 0) {
+			printf ("\n   ");
+		}
+
+		printf (" %08lX%s", info->start[i],
+			info->protect[i] ? " (RO)" : "     ");
+	}
+
+	printf ("\n");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+ulong flash_get_size (FPWV *addr, flash_info_t *info)
+{
+	/* Write auto select command: read Manufacturer ID */
+
+	/* Write auto select command sequence and test FLASH answer */
+	addr[0x0555] = (FPW)0x00AA00AA;	/* for AMD, Intel ignores this */
+	addr[0x02AA] = (FPW)0x00550055;	/* for AMD, Intel ignores this */
+	addr[0x0555] = (FPW)0x00900090;	/* selects Intel or AMD */
+
+	/* The manufacturer codes are only 1 byte, so just use 1 byte.
+	 * This works for any bus width and any FLASH device width.
+	 */
+	switch (addr[0] & 0xff) {
+
+	case (uchar)AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+
+	case (uchar)INTEL_MANUFACT:
+		info->flash_id = FLASH_MAN_INTEL;
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		break;
+	}
+
+	/* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */
+	if (info->flash_id != FLASH_UNKNOWN) switch (addr[1]) {
+
+	case (FPW)AMD_ID_LV640U:	/* 29LV640 and 29LV641 have same ID */
+		info->flash_id += FLASH_AM640U;
+		info->sector_count = 128;
+		info->size = 0x00800000 * (sizeof(FPW)/2);
+		break;				/* => 8 or 16 MB	*/
+
+	case (FPW)INTEL_ID_28F800C3B:
+		info->flash_id += FLASH_28F800C3B;
+		info->sector_count = 23;
+		info->size = 0x00100000 * (sizeof(FPW)/2);
+		break;				/* => 1 or 2 MB		*/
+
+	case (FPW)INTEL_ID_28F800B3B:
+		info->flash_id += FLASH_INTEL800B;
+		info->sector_count = 23;
+		info->size = 0x00100000 * (sizeof(FPW)/2);
+		break;				/* => 1 or 2 MB		*/
+
+	case (FPW)INTEL_ID_28F160C3B:
+		info->flash_id += FLASH_28F160C3B;
+		info->sector_count = 39;
+		info->size = 0x00200000 * (sizeof(FPW)/2);
+		break;				/* => 2 or 4 MB		*/
+
+	case (FPW)INTEL_ID_28F160B3B:
+		info->flash_id += FLASH_INTEL160B;
+		info->sector_count = 39;
+		info->size = 0x00200000 * (sizeof(FPW)/2);
+		break;				/* => 2 or 4 MB		*/
+
+	case (FPW)INTEL_ID_28F320C3B:
+		info->flash_id += FLASH_28F320C3B;
+		info->sector_count = 71;
+		info->size = 0x00400000 * (sizeof(FPW)/2);
+		break;				/* => 4 or 8 MB		*/
+
+	case (FPW)INTEL_ID_28F320B3B:
+		info->flash_id += FLASH_INTEL320B;
+		info->sector_count = 71;
+		info->size = 0x00400000 * (sizeof(FPW)/2);
+		break;				/* => 4 or 8 MB		*/
+
+	case (FPW)INTEL_ID_28F640C3B:
+		info->flash_id += FLASH_28F640C3B;
+		info->sector_count = 135;
+		info->size = 0x00800000 * (sizeof(FPW)/2);
+		break;				/* => 8 or 16 MB	*/
+
+	case (FPW)INTEL_ID_28F640B3B:
+		info->flash_id += FLASH_INTEL640B;
+		info->sector_count = 135;
+		info->size = 0x00800000 * (sizeof(FPW)/2);
+		break;				/* => 8 or 16 MB	*/
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* => no or unknown flash */
+	}
+
+	flash_get_offsets((ulong)addr, info);
+
+	/* Put FLASH back in read mode */
+	flash_reset(info);
+
+	return (info->size);
+}
+
+#ifdef CFG_FLASH_PROTECTION
+/*-----------------------------------------------------------------------
+ */
+
+static void flash_sync_real_protect(flash_info_t *info)
+{
+    FPWV *addr = (FPWV *)(info->start[0]);
+    FPWV *sect;
+    int i;
+
+    switch (info->flash_id & FLASH_TYPEMASK) {
+    case FLASH_28F800C3B:
+    case FLASH_28F800C3T:
+    case FLASH_28F160C3B:
+    case FLASH_28F160C3T:
+    case FLASH_28F320C3B:
+    case FLASH_28F320C3T:
+    case FLASH_28F640C3B:
+    case FLASH_28F640C3T:
+	/* check for protected sectors */
+	*addr = (FPW)0x00900090;
+	for (i = 0; i < info->sector_count; i++) {
+	    /* read sector protection at sector address, (A7 .. A0) = 0x02.
+	     * D0 = 1 for each device if protected.
+	     * If at least one device is protected the sector is marked
+	     * protected, but mixed protected and  unprotected devices
+	     * within a sector should never happen.
+	     */
+	    sect = (FPWV *)(info->start[i]);
+	    info->protect[i] = (sect[2] & (FPW)(0x00010001)) ? 1 : 0;
+	}
+
+	/* Put FLASH back in read mode */
+	flash_reset(info);
+	break;
+
+    case FLASH_AM640U:
+    default:
+	/* no hardware protect that we support */
+	break;
+    }
+}
+#endif
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	FPWV *addr;
+	int flag, prot, sect;
+	int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL;
+	ulong start, now, last;
+	int rcode = 0;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		if (info->flash_id == FLASH_UNKNOWN) {
+			printf ("- missing\n");
+		} else {
+			printf ("- no sectors to erase\n");
+		}
+		return 1;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_INTEL800B:
+	case FLASH_INTEL160B:
+	case FLASH_INTEL320B:
+	case FLASH_INTEL640B:
+	case FLASH_28F800C3B:
+	case FLASH_28F160C3B:
+	case FLASH_28F320C3B:
+	case FLASH_28F640C3B:
+	case FLASH_AM640U:
+		break;
+	case FLASH_UNKNOWN:
+	default:
+		printf ("Can't erase unknown flash type %08lx - aborted\n",
+			info->flash_id);
+		return 1;
+	}
+
+	prot = 0;
+	for (sect=s_first; sect<=s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+
+	if (prot) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	start = get_timer(0);
+	last  = start;
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last && rcode == 0; sect++) {
+
+		if (info->protect[sect] != 0)	/* protected, skip it */
+			continue;
+
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr = (FPWV *)(info->start[sect]);
+		if (intel) {
+			*addr = (FPW)0x00500050; /* clear status register */
+			*addr = (FPW)0x00200020; /* erase setup */
+			*addr = (FPW)0x00D000D0; /* erase confirm */
+		}
+		else {
+			/* must be AMD style if not Intel */
+			FPWV *base;		/* first address in bank */
+
+			base = (FPWV *)(info->start[0]);
+			base[0x0555] = (FPW)0x00AA00AA;	/* unlock */
+			base[0x02AA] = (FPW)0x00550055;	/* unlock */
+			base[0x0555] = (FPW)0x00800080;	/* erase mode */
+			base[0x0555] = (FPW)0x00AA00AA;	/* unlock */
+			base[0x02AA] = (FPW)0x00550055;	/* unlock */
+			*addr = (FPW)0x00300030;	/* erase sector */
+		}
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* wait at least 50us for AMD, 80us for Intel.
+		 * Let's wait 1 ms.
+		 */
+		udelay (1000);
+
+		while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) {
+			if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+				printf ("Timeout\n");
+
+				if (intel) {
+					/* suspend erase	*/
+					*addr = (FPW)0x00B000B0;
+				}
+
+				flash_reset(info);	/* reset to read mode */
+				rcode = 1;		/* failed */
+				break;
+			}
+
+			/* show that we're waiting */
+			if ((now - last) > 1000) {	/* every second */
+				putc ('.');
+				last = now;
+			}
+		}
+
+		flash_reset(info);	/* reset to read mode	*/
+	}
+
+	printf (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+    FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
+    int bytes;	  /* number of bytes to program in current word		*/
+    int left;	  /* number of bytes left to program			*/
+    int i, res;
+
+    for (left = cnt, res = 0;
+	 left > 0 && res == 0;
+	 addr += sizeof(data), left -= sizeof(data) - bytes) {
+
+        bytes = addr & (sizeof(data) - 1);
+        addr &= ~(sizeof(data) - 1);
+
+	/* combine source and destination data so can program
+	 * an entire word of 16 or 32 bits
+	 */
+        for (i = 0; i < sizeof(data); i++) {
+            data <<= 8;
+            if (i < bytes || i - bytes >= left )
+		data += *((uchar *)addr + i);
+	    else
+		data += *src++;
+	}
+
+	/* write one word to the flash */
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:
+		res = write_word_amd(info, (FPWV *)addr, data);
+		break;
+	case FLASH_MAN_INTEL:
+		res = write_word_intel(info, (FPWV *)addr, data);
+		break;
+	default:
+		/* unknown flash type, error! */
+		printf ("missing or unknown FLASH type\n");
+		res = 1;	/* not really a timeout, but gives error */
+		break;
+	}
+    }
+
+    return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for AMD FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data)
+{
+    ulong start;
+    int flag;
+    int res = 0;	/* result, assume success	*/
+    FPWV *base;		/* first address in flash bank	*/
+
+    /* Check if Flash is (sufficiently) erased */
+    if ((*dest & data) != data) {
+	return (2);
+    }
+
+
+    base = (FPWV *)(info->start[0]);
+
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    base[0x0555] = (FPW)0x00AA00AA;	/* unlock */
+    base[0x02AA] = (FPW)0x00550055;	/* unlock */
+    base[0x0555] = (FPW)0x00A000A0;	/* selects program mode */
+
+    *dest = data;		/* start programming the data	*/
+
+    /* re-enable interrupts if necessary */
+    if (flag)
+	enable_interrupts();
+
+    start = get_timer (0);
+
+    /* data polling for D7 */
+    while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) {
+	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+	    *dest = (FPW)0x00F000F0;	/* reset bank */
+	    res = 1;
+	}
+    }
+
+    return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for Intel FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_intel (flash_info_t *info, FPWV *dest, FPW data)
+{
+    ulong start;
+    int flag;
+    int res = 0;	/* result, assume success	*/
+
+    /* Check if Flash is (sufficiently) erased */
+    if ((*dest & data) != data) {
+	return (2);
+    }
+
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    *dest = (FPW)0x00500050;	/* clear status register	*/
+    *dest = (FPW)0x00FF00FF;	/* make sure in read mode	*/
+    *dest = (FPW)0x00400040;	/* program setup		*/
+
+    *dest = data;		/* start programming the data	*/
+
+    /* re-enable interrupts if necessary */
+    if (flag)
+	enable_interrupts();
+
+    start = get_timer (0);
+
+    while (res == 0 && (*dest & (FPW)0x00800080) != (FPW)0x00800080) {
+	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+	    *dest = (FPW)0x00B000B0;	/* Suspend program	*/
+	    res = 1;
+	}
+    }
+
+    if (res == 0 && (*dest & (FPW)0x00100010))
+	res = 1;	/* write failed, time out error is close enough	*/
+
+    *dest = (FPW)0x00500050;	/* clear status register	*/
+    *dest = (FPW)0x00FF00FF;	/* make sure in read mode	*/
+
+    return (res);
+}
+
+#ifdef CFG_FLASH_PROTECTION
+/*-----------------------------------------------------------------------
+ */
+int flash_real_protect (flash_info_t * info, long sector, int prot)
+{
+	int rcode = 0;		/* assume success */
+	FPWV *addr;		/* address of sector */
+	FPW value;
+
+	addr = (FPWV *) (info->start[sector]);
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F800C3B:
+	case FLASH_28F800C3T:
+	case FLASH_28F160C3B:
+	case FLASH_28F160C3T:
+	case FLASH_28F320C3B:
+	case FLASH_28F320C3T:
+	case FLASH_28F640C3B:
+	case FLASH_28F640C3T:
+		flash_reset (info);		/* make sure in read mode */
+		*addr = (FPW) 0x00600060L;	/* lock command setup */
+		if (prot)
+			*addr = (FPW) 0x00010001L;	/* lock sector */
+		else
+			*addr = (FPW) 0x00D000D0L;	/* unlock sector */
+		flash_reset (info);		/* reset to read mode */
+
+		/* now see if it really is locked/unlocked as requested */
+		*addr = (FPW) 0x00900090;
+		/* read sector protection at sector address, (A7 .. A0) = 0x02.
+		 * D0 = 1 for each device if protected.
+		 * If at least one device is protected the sector is marked
+		 * protected, but return failure. Mixed protected and
+		 * unprotected devices within a sector should never happen.
+		 */
+		value = addr[2] & (FPW) 0x00010001;
+		if (value == 0)
+			info->protect[sector] = 0;
+		else if (value == (FPW) 0x00010001)
+			info->protect[sector] = 1;
+		else {
+			/* error, mixed protected and unprotected */
+			rcode = 1;
+			info->protect[sector] = 1;
+		}
+		if (info->protect[sector] != prot)
+			rcode = 1;	/* failed to protect/unprotect as requested */
+
+		/* reload all protection bits from hardware for now */
+		flash_sync_real_protect (info);
+		break;
+
+	case FLASH_AM640U:
+	default:
+		/* no hardware protect that we support */
+		info->protect[sector] = prot;
+		break;
+	}
+
+	return rcode;
+}
+#endif